US2738736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame structure for discharge opening of a railway car hopper
Assignee: Enterprise Railway Equipment Co
•
Filing: 1951-12-12
•
Granted: 1956-03-20
•
Expires: 1971-12-12
Abstract
No abstract record available.
Inventors
- 👤 George B Dorey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:21
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US114816A
Cited
US518011A
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US820240A
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US1348752A
Cited
US2072292A
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US2142236A
Cited
US2222280A
Cited
US2429696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |